NOMENCLATURE OF THE MONOCULAR MOVEMENTS
When one eye is excluded from vision it still regularly moves in association with its fellow, following in part, though not wholly, the laws that obtain when the two eyes are used together. One cannot properly, therefore, speak of monocular as something distinct from binocular movements. Nevertheless, the analysis of binocular movements becomes easier if one considers, first, how each eye is individually turned by the muscles attached to it. Such a consideration has the advantage that in making it one does not have to know what the other eye is doing and hence does not have to determine whether the movement of the observed eye is one of parallel action, convergence or divergence. It may be any of the three or a compound of two of them, but one does not have to decide this. I simply describe it in terms of
DUANE A. THE MONOCULAR MOVEMENTS. Arch Ophthalmol. 1932;8(4):530–549. doi:10.1001/archopht.1932.00820170050005
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